Subacute inhalation exposure of rats to 1,6-hexamethylene diisocyanate with recovery period.

In this subacute inhalation toxicity study of 1,6-hexamethylene diisocyanate (HDI), groups of 10 male and 10 female Sprague-Dawley rats were exposed to 0, 0.005, 0.0175, or 0.